Rockwell Automation AADvance Controller Troubleshooting and Maintenance Manual - Manual (Page 76)

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6-16 Document: 553634
(ICSTT-RM406F_EN_P) Issue: 089:
Troubleshooting and Maintenance Manual (AADvance
Controller)
The provision of an Operation and Maintenance Plan ensures that functional safety can be maintained
beyond the commissioning of the system. The in-service operation and maintenance is normally outside
the responsibility of the system integrator, but the system integrator can provide guidance and
procedures to ensure that the persons or organizations responsible for operation and maintenance can
ensure the system operates to the specified safety levels.
The Operating and Maintenance Plan shall include the following items:
 Clear definitions of power up and down sequences. These definitions shall ensure
that the sequences cannot result in periods when the system is unable to respond
safely whilst a hazard may be present.
 The procedures for re-calibrating sensors and actuators. The recommended
calibration periods shall also be included.
 The procedures for periodically testing the system, together with definitions of the
maximum intervals between testing.
 Definitions of the overrides to be applied to be able to carry maintenance of the
sensors and actuators.
 The procedures for maintaining system security.
Input Module Calibration
The Operation and Maintenance Plan shall include recommendations to check the calibration of
controller input modules.
The calibration of each analogue input module should be checked every two years; the calibration of
each digital input module should be checked every five years.
Planned Maintenance
In most system configurations there will be some elements that are not tested by the system's internal
diagnostics — for example, the final passive elements in I/O modules, the sensors and actuators
themselves, and the field wiring.
A regime of planned maintenance testing shall be defined to ensure that any faults, which could
ultimately lead to the system's inability to perform its safety functions, do not accumulate. The
Chapter 6
Operation and Maintenance Plan